Model: 21A4C8

Hexagon Plain Nut

Properties:

Thread Class
2b
Thread Direction
Right-hand
Nut Style
Hexagon
Nut Height
Between 0.117 inches and 0.130 inches
End Application
W/s: missile, advanced medium range air-to-air (amraam)/aim120a; support equipment, b-1 aircraft; airborne mobile dir air spt ctl (2id), (02m jul83)(an/uyq-3a); sentinel radar system; tactical data system, an/uya- (v); vehicle, aircraft refueler r-14; test station, oq-290(v)msm: boilers, 1200 psi; fire pumps; l.P.Compressors; nsn 4210-01-486-1035 tfft (tactical fire fighting truck)
Width Across Flats
Between 0.332 inches and 0.344 inches
Thread Series
Unc
Thready Qty Per Inch (tpi)
32
Thread Size
0.164 inches
Bearing Surface Type
Chamfered
Material
Steel
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, cl 3 federal specification single treatment response
Nondefinitive Specification/std Data
2 type and 13 style
NSN
5310-00-934-9757
Part Number
21A4C8
Description
Nut,plain,hexagon
CAGE
33968

A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 21A4C8 NSN 5310-00-934-9757

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01857
FIIG:
A021A0
Concept No.:
1
App. Key:
AG
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
5.5000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
573
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318160000
  • SITC: 69421
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Nuts of iron or steel

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