BA THREAD

Descriptions

BA (British Association) threads are a British standard for small screws and fasteners, primarily used in precision instruments, model engineering, and legacy electrical equipment. Unlike metric threads, they are designated by a number (e.g., 0BA, 2BA, 4BA), where a higher number indicates a smaller diameter.

Key Characteristics

Thread Angle: BA threads have a unique, symmetrical V-profile with a 47.5° flank angle. This differs from the 60° angle used by metric and Unified threads, making them non-interchangeable.
Thread Profile: The threads feature rounded crests and roots to reduce stress concentrations and enhance durability in delicate applications.
Sizing System: The system is based on a geometric progression, with the pitch of each successive size (higher number) being approximately 0.9 times the pitch of the lower number.
Standardization: They are specified by British Standard BS 93:2008, which defines dimensions and tolerances for sizes 0BA to 16BA.

Specifications

No detailed specifications are available for this product.

Downloads

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Code	Description	Price	Quantity
SCBA0050	0BA X 1/2 SOCKET CAPSCREW 400 In Stock for dispatch	Price Unavailable	- +
SCBA0062	OBA X 5/8 SOCKET CAPSCREW 20 In Stock for dispatch	Price Unavailable	- +
SCBA0075	0BA X 3/4 SOCKET CAPSCREW Out of Stock	£105.00 (exc VAT) per HUND £126.00 (inc VAT) per HUND	- +
SCBA0150	0BA X 1.1/2 SOCKET CAPSCREW Out of Stock	£300.00 (exc VAT) per HUND £360.00 (inc VAT) per HUND	- +
SCBA2025	2BA X 1/4 SOCKET CAPSCREW Out of Stock	£61.50 (exc VAT) per HUND £73.80 (inc VAT) per HUND	- +
SCBA2031	2BA X 5/16 SOCKET CAPSCREW 200 In Stock for dispatch	£64.40 (exc VAT) per HUND £77.28 (inc VAT) per HUND	- +
SCBA2037	2BA X 3/8 SOCKET CAPSCREW 100 In Stock for dispatch	£41.50 (exc VAT) per HUND £49.80 (inc VAT) per HUND	- +
SCBA2050	2BA X 1/2 SOCKET CAPSCREW 330 In Stock for dispatch	£78.85 (exc VAT) per HUND £94.62 (inc VAT) per HUND	- +
SCBA2062	2BA X 5/8 SOCKET CAPSCREW 50 In Stock for dispatch	£78.48 (exc VAT) per HUND £94.18 (inc VAT) per HUND	- +
SCBA2075	2BA X 3/4 SOCKET CAPSCREW 204 In Stock for dispatch	£88.40 (exc VAT) per HUND £106.08 (inc VAT) per HUND	- +
SCBA2075P	2BA X 3/4 SOCKET CAPSCREW ZINC PLATED Out of Stock	£61.70 (exc VAT) per HUND £74.04 (inc VAT) per HUND	- +
SCBA2100	2BA X 1" SOCKET CAPSCREW Out of Stock	£92.20 (exc VAT) per HUND £110.64 (inc VAT) per HUND	- +
SCBA2125	2BA X 1.1/4 SOCKET CAPSCREW Out of Stock	£69.46 (exc VAT) per HUND £83.35 (inc VAT) per HUND	- +
SCBA2150	2BA X 1.1/2 SOCKET CAPSCREW 88 In Stock for dispatch	£74.70 (exc VAT) per HUND £89.64 (inc VAT) per HUND	- +
SCBA2175	2BA X 1.3/4 SOCKET CAPSCREW Out of Stock	£82.00 (exc VAT) per HUND £98.40 (inc VAT) per HUND	- +
SCBA2200	2BA X 2" SOCKET CAPSCREW Out of Stock	£107.90 (exc VAT) per HUND £129.48 (inc VAT) per HUND	- +
SCBA2250	2BA X 2.1/2 SOCKET CAPSCREW 54 In Stock for dispatch	£100.00 (exc VAT) per HUND £120.00 (inc VAT) per HUND	- +
SCBA3037	3BA X 3/8 SOCKET CAPSCREW 8 In Stock for dispatch	Price Unavailable	- +
SCBA3050	3BA X 1/2 SOCKET CAPSCREW 50 In Stock for dispatch	Price Unavailable	- +
SCBA3075	3BA X 3/4 SOCKET CAPSCREW 200 In Stock for dispatch	Price Unavailable	- +
SCBA4019	4BA X 3/16 SOCKET CAPSCREW Out of Stock	£162.70 (exc VAT) per HUND £195.24 (inc VAT) per HUND	- +
SCBA4025	4BA X 1/4 SOCKET CAPSCREW 150 In Stock for dispatch	£66.00 (exc VAT) per HUND £79.20 (inc VAT) per HUND	- +
SCBA4031	4BA X 5/16 SOCKET CAPSCREW 110 In Stock for dispatch	£95.21 (exc VAT) per HUND £114.25 (inc VAT) per HUND	- +
SCBA4037	4BA X 3/8 SOCKET CAPSCREW Out of Stock	£200.00 (exc VAT) per HUND £240.00 (inc VAT) per HUND	- +
SCBA4050	4BA X 1/2 SOCKET CAPSCREW 9 In Stock for dispatch	£53.30 (exc VAT) per HUND £63.96 (inc VAT) per HUND	- +
SCBA4062	4BA X 5/8 SOCKET CAPSCREW 84 In Stock for dispatch	Price Unavailable	- +
SCBA4075	4BA X 3/4 SOCKET CAPSCREW Out of Stock	Price Unavailable	- +
SCBA4100	4BA X 1" SOCKET CAPSCREW Out of Stock	£47.07 (exc VAT) per HUND £56.48 (inc VAT) per HUND	- +
SCBA4125	4BA X 1.1/4 SOCKET CAPSCREW Out of Stock	Price Unavailable	- +
SCBA4150	4BA X 1.1/2 SOCKET CAPSCREW 141 In Stock for dispatch	£36.00 (exc VAT) per HUND £43.20 (inc VAT) per HUND	- +
SCBA4200	4BA X 2" SOCKET CAPSCREW Out of Stock	£104.40 (exc VAT) per HUND £125.28 (inc VAT) per HUND	- +
SCBA6025	6BA X 1/4 SOCKET CAPSCREW Out of Stock	£47.20 (exc VAT) per HUND £56.64 (inc VAT) per HUND	- +
SCBA6037	6BA X 3/8 SOCKET CAPSCREW Out of Stock	£62.90 (exc VAT) per HUND £75.48 (inc VAT) per HUND	- +
SCBA6050	6BA X 1/2 SOCKET CAPSCREW 58 In Stock for dispatch	£24.30 (exc VAT) per HUND £29.16 (inc VAT) per HUND	- +
SCBA6062	6BA X 5/8 SOCKET CAPSCREW Out of Stock	Price Unavailable	- +
SCBA6075	6BA X 3/4 SOCKET CAPSCREW Out of Stock	£56.00 (exc VAT) per HUND £67.20 (inc VAT) per HUND	- +
SCBA6100	6BA X 1" SOCKET CAPSCREW Out of Stock	£228.10 (exc VAT) per HUND £273.72 (inc VAT) per HUND	- +
SCBA6125	6BA X 1.1/4 SOCKET CAPSCREW 101 In Stock for dispatch	Price Unavailable	- +
SCBA8025	8BA X 1/4 SOCKET CAPSCREW 10 In Stock for dispatch	Price Unavailable	- +
SCBA8050	8BA X 1/2 SOCKET CAPSCREW Out of Stock	£122.10 (exc VAT) per HUND £146.52 (inc VAT) per HUND	- +
SCBA8075	8BA X 3/4 SOCKET CAPSCREW Out of Stock	£149.20 (exc VAT) per HUND £179.04 (inc VAT) per HUND	- +

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