27-1821 — GASKET

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

27-1821: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR OR RUBBER BUTADIENE-STYRENE CLASS SBR OVERALL, hole_diameter: 0.201 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 2.940 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN, overall_length: 2.940 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN, style_designator: NON-CIRCULAR, aperture_diameter: 3.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-721-8445, 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

27-1821

NSN: 5305-00-721-8445
NIINs: 007218445, 011814977
FSC: 5305 — Screws
CAGE: 24617 — GENERAL MOTORS CORP (USA)

SPECIFICATIONS

material	RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR OR RUBBER BUTADIENE-STYRENE CLASS SBR OVERALL
hole_diameter	0.201 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width	2.940 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN
overall_length	2.940 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN
style_designator	NON-CIRCULAR
aperture_diameter	3.250 INCHES NOMINAL IN
bolt_hole_quantity	4
cross-sectional_thickness	0.095 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN
cross-sectional_shape_style	SOLID SINGLE OR COMPOSITION
material_document_and_classification	MIL-STD-417 MIL STD SINGLE MATERIAL RESPONSE OVERALL
outside_corner_bevel_length_along_width	1.240 INCHES NOMINAL IN
outside_corner_bevel_length_along_length	1.240 INCHES NOMINAL IN
NSN	5305-00-721-8445

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN

•

FASTENER LENGTH: 3.500 INCHES NOMINAL IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 2.000 INCHES MINIMUM AND 2.277 INCHES MAXIMUM IN

•

HARDNESS RATING: 22.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL

•

MATERIAL DOCUMENT AND CLASSIFICATION: SAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.875 INCHES IN

•

HEAD STYLE: HEXAGON

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
FASTENER LENGTH	3.500 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
THREAD LENGTH	2.000 INCHES MINIMUM AND 2.277 INCHES MAXIMUM IN
HARDNESS RATING	22.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	SAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.875 INCHES IN
HEAD STYLE	HEXAGON
THREAD DIRECTION	RIGHT-HAND
WIDTH BETWEEN FLATS	1.285 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN

SUBSTITUTES & CROSS-REFERENCES 1

MS35297-215Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 27-1821?

27-1821 is a GASKET.

What parts can replace 27-1821?

There is 1 known substitute for 27-1821: MS35297-215. Substitute compatibility should be verified for your specific system.

What is the NSN for 27-1821?

27-1821 is cataloged in the U.S. Government catalog under NSN 5305-00-721-8445. This indicates validated use in U.S. government and defense supply chains.

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