638672 — CIRCUIT CARD ASSEMBLY

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

638672: CIRCUIT CARD ASSEMBLY.

The CIRCUIT CARD ASSEMBLY is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: HEXAGON, nut_height: 0.220 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-931-8552, 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

638672

NSN: 5310-00-931-8552
NIINs: 009318552, 011388459
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)

SPECIFICATIONS

material	IRON ALLOY 660 OVERALL
nut_style	HEXAGON
nut_height	0.220 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
precious_material	SILVER
surface_treatment	SILVER OVERALL
width_across_flats	0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
nominal_thread_size	0.190 INCHES IN
bearing_surface_type	CHAMFERED
NSN	5310-00-931-8552

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

PRECIOUS MATERIAL: SILVER

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.190 INCHES IN

•

LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN

•

NUT HEIGHT: 0.220 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
PRECIOUS MATERIAL	SILVER
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.190 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT	0.220 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
SURFACE TREATMENT	SILVER OVERALL
NUT STYLE	HEXAGON

SUBSTITUTES & CROSS-REFERENCES 5

493771Reference document

Same NSN cross-reference

Reference document — Secondary reference

Z6797-02KReference document

Same NSN cross-reference

Reference document — Secondary reference

H29117-3Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LH9353-KReference document

Same NSN cross-reference

Reference document — Secondary reference

337972Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 638672?

638672 is a CIRCUIT CARD ASSEMBLY.

What parts can replace 638672?

There are 5 known substitutes for 638672: 493771, Z6797-02K, H29117-3 and 2 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 638672?

638672 is cataloged in the U.S. Government catalog under NSN 5310-00-931-8552. This indicates validated use in U.S. government and defense supply chains.

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