A4991 — FILTER,RADIO FREQUENCY INTERFERE

✓ Government record, cited

— · MRO · MRO_GENERAL

PRODUCT OVERVIEW

A4991: FILTER,RADIO FREQUENCY INTERFERE.

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include material: COPPER ALLOY 360 SHELL, body_width: 6.970 INCHES MINIMUM AND 7.030 INCHES MAXIMUM IN, body_height: 3.720 INCHES MINIMUM AND 3.780 INCHES MAXIMUM IN, body_length: 7.970 INCHES MINIMUM AND 8.030 INCHES MAXIMUM IN, input_phase: SINGLE SINGLE OPERATING POWER RQMT, overall_width: 7.400 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 6250-00-243-7674, 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

MRO→ MRO_GENERAL→ A4991

NSN: 6250-00-243-7674
NIINs: 002437674, 002598609, 012036695, 012776039
FSC: 6250 — Ballasts, Lampholders, and Starters
CAGE: 72914 — GRIMES AEROSPACE COMPANY (USA)

SPECIFICATIONS

material	COPPER ALLOY 360 SHELL
body_width	6.970 INCHES MINIMUM AND 7.030 INCHES MAXIMUM IN
body_height	3.720 INCHES MINIMUM AND 3.780 INCHES MAXIMUM IN
body_length	7.970 INCHES MINIMUM AND 8.030 INCHES MAXIMUM IN
input_phase	SINGLE SINGLE OPERATING POWER RQMT
overall_width	7.400 INCHES NOMINAL IN
inclosure_type	ENCASED
overall_height	5.120 INCHES NOMINAL IN
overall_length	11.250 INCHES NOMINAL IN
mounting_method	EXTERNAL THREADED LOCATION NOT OTHERWISE SPECIFIED
special_features	TECH ORDER 35C1-2-1034-2
style_designator	RECTANGULAR TERMINAL/TERMINALS ON OPPOSITE SURFACES
NSN	6250-00-243-7674

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416, TYPE 2, CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE SHELL

•

MOUNTING METHOD: EXTERNAL THREADED LOCATION NOT OTHERWISE SPECIFIED

•

MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE BODY

•

SURFACE TREATMENT: CADMIUM AND CHROMATE SHELL

•

MATERIAL: COPPER ALLOY 360 BODY

TECHNICAL CHARACTERISTICS

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416, TYPE 2, CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE SHELL
MOUNTING METHOD	EXTERNAL THREADED LOCATION NOT OTHERWISE SPECIFIED
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-B-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-B-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE SHELL
SURFACE TREATMENT	CADMIUM AND CHROMATE SHELL
MATERIAL	COPPER ALLOY 360 BODY
MATERIAL	COPPER ALLOY 360 SHELL

SUBSTITUTES & CROSS-REFERENCES 1

A4991-1Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is A4991?

A4991 is a FILTER,RADIO FREQUENCY INTERFERE. It is classified as a MRO (MRO_GENERAL).

What parts can replace A4991?

There is 1 known substitute for A4991: A4991-1. Substitute compatibility should be verified for your specific system.

What is the NSN for A4991?

A4991 is cataloged in the U.S. Government catalog under NSN 6250-00-243-7674. This indicates validated use in U.S. government and defense supply chains.

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A4991 — FILTER,RADIO FREQUENCY INTERFERE

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