21138 ITEM 28 — BOLT,INTERNAL WRENCHING

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

21138 ITEM 28: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 3A A, fastener_length: 2.375 INCHES NOMINAL IN, special_features: DRILLED HEAD, surface_treatment: CADMIUM AND CHROMATE OVERALL, nominal_thread_diameter: 0.312 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-416-0620, 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

21138 ITEM 28

NSN: 5306-01-416-0620
FSC: 5306 — Bolts
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)

SPECIFICATIONS

material	STEEL OVERALL
thread_class	3A A
fastener_length	2.375 INCHES NOMINAL IN
special_features	DRILLED HEAD
surface_treatment	CADMIUM AND CHROMATE OVERALL
nominal_thread_diameter	0.312 INCHES IN
thread_quantity_per_inch	24
thread_series_designator	UNIFIED NATIONAL JOINT FINE (UNJF)
material_document_and_classification	MIL-B-7838 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classification	QQ-P-416, TYPE II FED SPEC ALL TREATMENT RESPONSES OVERALL
NSN	5306-01-416-0620

COMPONENT DIAGRAM

KEY FEATURES

•

FASTENER LENGTH: 2.375 INCHES NOMINAL IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416, TYPE II FED SPEC ALL TREATMENT RESPONSES OVERALL

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-7838 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.312 INCHES IN

•

SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL

•

THREAD CLASS: 3A A

•

THREAD QUANTITY PER INCH: 24

TECHNICAL CHARACTERISTICS

FASTENER LENGTH	2.375 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416, TYPE II FED SPEC ALL TREATMENT RESPONSES OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-B-7838 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.312 INCHES IN
SPECIAL FEATURES	DRILLED HEAD
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL
THREAD CLASS	3A A
THREAD QUANTITY PER INCH	24
MATERIAL	STEEL OVERALL
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)

OTHER ITEMS IN FSC 5306 — Bolts

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017

SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 21138 ITEM 28?

21138 ITEM 28 is a BOLT,INTERNAL WRENCHING.

What is the NSN for 21138 ITEM 28?

21138 ITEM 28 is cataloged in the U.S. Government catalog under NSN 5306-01-416-0620. This indicates validated use in U.S. government and defense supply chains.

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21138 ITEM 28 — BOLT,INTERNAL WRENCHING

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