621-2528 — THUMBNUT ASSEMBLY

✓ Government record, cited

— · MRO · MRO_GENERAL

PRODUCT OVERVIEW

621-2528: THUMBNUT ASSEMBLY.

The THUMBNUT ASSEMBLY is a the manufacturer industrial component. Key specifications include end_item_identification: MOUNTING BASE,EL MT-4681A/A A. This part is cataloged in the U.S.

Government catalog under NSN 5826-01-111-9699, 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→ 621-2528

NSN: 5826-01-111-9699
FSC: 5826 — Radio Navigation Equipment, Airborne
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)

SPECIFICATIONS

end_item_identification	MOUNTING BASE,EL MT-4681A/A A
NSN	5826-01-111-9699

COMPONENT DIAGRAM

KEY FEATURES

•

GENERAL CHARACTERISTICS ITEM DESCRIPTION: AL,2024 TEM T351,0.750 PORM 0.002 IN. DIA,PER QQ-A-225/6; COMPRESSION SPRING,P/N 757-3937-001 AND BALL,P/N 309-0019-000 PLACED IN THUMBNUT,P/N 621-2528-002 FOUR PLACES AND SECURED BY RETAINER INSERT,P/N 757-3933-001; FOUR 0.128 IN. MIN,0.131 IN. MAX DIA HOLES ON 0.528 IN. MIN,0.534 IN. MAX DIA BOLT CIRCLE CONCENTRIC WITHIN 0.003 IN. DIA TO CENTER HOLE WITH 0.328 IN. MIN,0.329 IN. MAX DIA,COUNTERSUNK 88.0 DEG MIN,92.0 DEG MAX TO 0.365 IN. MIN,0.385 IN. MAX DIA; THUMBNUT FLATTED TO 0.500 IN.; O/A THK 0.437 IN.; THUMBNUT FINISH ANODIC COATING TYPE I OR II PER MIL-A-8625 IN

TECHNICAL CHARACTERISTICS

GENERAL CHARACTERISTICS ITEM DESCRIPTION

AL,2024 TEM T351,0.750 PORM 0.002 IN. DIA,PER QQ-A-225/6; COMPRESSION SPRING,P/N 757-3937-001 AND BALL,P/N 309-0019-000 PLACED IN THUMBNUT,P/N 621-2528-002 FOUR PLACES AND SECURED BY RETAINER INSERT,P/N 757-3933-001; FOUR 0.128 IN. MIN,0.131 IN. MAX DIA HOLES ON 0.528 IN. MIN,0.534 IN. MAX DIA BOLT CIRCLE CONCENTRIC WITHIN 0.003 IN. DIA TO CENTER HOLE WITH 0.328 IN. MIN,0.329 IN. MAX DIA,COUNTERSUNK 88.0 DEG MIN,92.0 DEG MAX TO 0.365 IN. MIN,0.385 IN. MAX DIA; THUMBNUT FLATTED TO 0.500 IN.; O/A THK 0.437 IN.; THUMBNUT FINISH ANODIC COATING TYPE I OR II PER MIL-A-8625 IN

END ITEM IDENTIFICATION

MOUNTING BASE,EL MT-4681A/A A

OTHER ITEMS IN FSC 5826 — Radio Navigation Equipment, Airborne

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

5826-00-001-3742 5826-00-001-4074 5826-00-001-4076 5826-00-001-5435 5826-00-001-6387 5826-00-001-7043 5826-00-003-4862 5826-00-003-4863

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 621-2528?

621-2528 is a THUMBNUT ASSEMBLY. It is classified as a MRO (MRO_GENERAL).

What is the NSN for 621-2528?

621-2528 is cataloged in the U.S. Government catalog under NSN 5826-01-111-9699. This indicates validated use in U.S. government and defense supply chains.

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621-2528 — THUMBNUT ASSEMBLY

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