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Technical Data Sheet
PartsTable / COMPONENT / A1891
A1891 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The INSIGNIA,SHOULDER SLEEVE is a the manufacturer industrial component. Key specifications include special_features: FOLIAGE GREEN WITH ATTACHED HOOK FASTENER, features_provided: EMBROIDERED, department_designation: US ARMY, procurement_group_code: 32849, award_identification_designator: TAB, 248TH ARMY BAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-355-2033, 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
A1891
NSN: 5325-00-355-2033
FSC: 5325
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
special_featuresFOLIAGE GREEN WITH ATTACHED HOOK FASTENER
features_providedEMBROIDERED
department_designationUS ARMY
procurement_group_code32849
award_identification_designatorTAB, 248TH ARMY BAND
NSN5325-00-355-2033
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A1891 · 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
•
END STYLE: VERTEX OUTSIDE PERIPHERY
•
MATERIAL: STEEL COMP 1065
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633,F1065 FED SPEC SINGLE MATERIAL RESPONSE
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
MATERIAL HARDNESS RATING: 43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
•
INSIDE DIAMETER: 4.062 INCHES NOMINAL IN
•
USAGE DESIGN: EXTERNAL
•
RING STYLE: STRAIGHT GAP
TECHNICAL CHARACTERISTICS (FLIS)
END STYLEVERTEX OUTSIDE PERIPHERY
MATERIALSTEEL COMP 1065
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633,F1065 FED SPEC SINGLE MATERIAL RESPONSE
CASEHARDENING INDICATORNOT CASEHARDENED
MATERIAL HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
INSIDE DIAMETER4.062 INCHES NOMINAL IN
USAGE DESIGNEXTERNAL
RING STYLESTRAIGHT GAP
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER4.434 INCHES MINIMUM AND 4.442 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
12332-3Interchangeable
interchangeable cross-reference
interchangeable
AN150258Interchangeable
interchangeable cross-reference
interchangeable
14D3240-4Interchangeable
interchangeable cross-reference
interchangeable
Q40SP125-016Interchangeable
interchangeable cross-reference
interchangeable
20665001-23Interchangeable
interchangeable cross-reference
interchangeable
80EA1C1F1WL2N13GYR0N02SLEWInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A1891?
A1891 is a INSIGNIA,SHOULDER SLEEVE.
What parts can replace A1891?
There are 14 known substitutes for A1891: 12332-3, AN150258, 14D3240-4 and 11 more. Substitute compatibility should be verified for your specific system.
Is A1891 still available?
A1891 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026