A26644 — VALVE,VACUUM BREAKING

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

A26644: VALVE,VACUUM BREAKING.

The VALVE,VACUUM BREAKING is a the manufacturer industrial component. Key specifications include material: FIBER LOCKING INSERT, nut_height: 0.172 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-050-3238, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

A26644

NSN: 5310-00-050-3238
NIINs: 000503238, 008983003
FSC: 5310 — Nuts and Washers
CAGE: 78570 — SMITHS TUBULAR SYSTEMS-LACONIA, INC. (USA)

SPECIFICATIONS

material	FIBER LOCKING INSERT
nut_height	0.172 INCHES NOMINAL IN
thread_class	2B
thread_series	UNIFIED NATIONAL COARSE (UNC)
locking_feature	PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM OR ZINC NUT
width_across_flats	0.313 INCHES NOMINAL IN
nominal_thread_size	0.138 INCHES IN
thread_quantity_per_inch	32
material_document_and_classification	QQ-S-633,CANC FED SPEC SINGLE MATERIAL RESPONSE NUT
NSN	5310-00-050-3238

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.313 INCHES NOMINAL IN

•

THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)

•

MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633,CANC FED SPEC SINGLE MATERIAL RESPONSE NUT

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.138 INCHES IN

•

LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT

•

NUT HEIGHT: 0.172 INCHES NOMINAL IN

•

SURFACE TREATMENT: CADMIUM OR ZINC NUT

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.313 INCHES NOMINAL IN
THREAD SERIES	UNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-633,CANC FED SPEC SINGLE MATERIAL RESPONSE NUT
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.138 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT	0.172 INCHES NOMINAL IN
SURFACE TREATMENT	CADMIUM OR ZINC NUT
THREAD CLASS	2B
THREAD QUANTITY PER INCH	32

SUBSTITUTES & CROSS-REFERENCES 5

503238Reference document

Same NSN cross-reference

Reference document — Secondary reference

8630-23-11CReference document

Same NSN cross-reference

Reference document — Secondary reference

8630-23-11Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

A186681Reference document

Same NSN cross-reference

Reference document — Secondary reference

107361HReference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is A26644?

A26644 is a VALVE,VACUUM BREAKING.

What parts can replace A26644?

There are 5 known substitutes for A26644: 503238, 8630-23-11C, 8630-23-11 and 2 more. Substitute compatibility should be verified for your specific system.

What is the NSN for A26644?

A26644 is cataloged in the U.S. Government catalog under NSN 5310-00-050-3238. This indicates validated use in U.S. government and defense supply chains.

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