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HS4874-6B4A — GROMMET,METALLIC

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

HS4874-6B4A: GROMMET,METALLIC.

The GROMMET,METALLIC is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 WASHER, barrel_style: BELL FLANGE STRAIGHT TYPE, flange_style: FLANGE, washer_style: FLAT W/ FORMED INNER EDGE, surface_treatment: ANODIZE OVERALL, barrel_overall_height: 0.247 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-499-5056, 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
HS4874-6B4A
NSN: 5325-01-499-5056
FSC: 5325 — Fastening Devices
CAGE: 8V613 — THE BOEING COMPANY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 WASHER
barrel_styleBELL FLANGE STRAIGHT TYPE
flange_styleFLANGE
washer_styleFLAT W/ FORMED INNER EDGE
surface_treatmentANODIZE OVERALL
barrel_overall_height0.247 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
barrel_outside_diameter0.405 INCHES MAXIMUM IN
end_item_identificationAPACHE HELICOPTER
flange_outside_diameter0.875 INCHES NOMINAL IN
material_document_and_classificationQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/4 FED SPEC SINGLE MATERIAL RESPONSE WASHER
part_name_assigned_by_controlling_agencyGROMMET,THERMAL-BONDED,FLARED
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-01-499-5056
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: HS4874-6B4A · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
FLANGE OUTSIDE DIAMETER: 0.875 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/4 FED SPEC SINGLE MATERIAL RESPONSE WASHER
•
WASHER STYLE: FLAT W/ FORMED INNER EDGE
•
BARREL OVERALL HEIGHT: 0.247 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
BARREL OUTSIDE DIAMETER: 0.405 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
FLANGE OUTSIDE DIAMETER0.875 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/4 FED SPEC SINGLE MATERIAL RESPONSE WASHER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE GROMMET
WASHER STYLEFLAT W/ FORMED INNER EDGE
BARREL OVERALL HEIGHT0.247 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
BARREL OUTSIDE DIAMETER0.405 INCHES MAXIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYGROMMET,THERMAL-BONDED,FLARED
END ITEM IDENTIFICATIONAPACHE HELICOPTER
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HS4874-6B4A?
HS4874-6B4A is a GROMMET,METALLIC.
What is the NSN for HS4874-6B4A?
HS4874-6B4A is cataloged in the U.S. Government catalog under NSN 5325-01-499-5056. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.