Model: MS21318-8

Drive Screw

Properties:

Fastener Length
0.188 inches
Head Style
Round
Head Diameter
Between 0.118 inches and 0.127 inches
Head Height
Between 0.041 inches and 0.049 inches
Pilot Diameter
Between 0.060 inches and 0.063 inches
Pilot Length
0.047 inches
End Application
Communications terminal, satellite an/gsc-3 (v)1; engine, aircraft tf33-p-3/5/9 (c/ec-135, b-52h); trainer, b-1b aircraft; systems, jp-5 aviation fuels; airborne mobile dir air spt ctl (2id), 02m jul83)(an/uyq-3a); close in weapon system (ciws-phalanx); engine, aircraft tf33-pw-102 (c135e, ec-135h/k/p); aircraft, (ac-130h, mc-130h, ec-130e, hc-130) ; support equipment, b-1 aircraft; gun, 5-in./54 cal, mk-54; guided missile launching sys
Features Provided
Casehardened
Nonmachine Thread Style
Drive screw (type u)
Nonmachine Thread Diameter
0.073 inches
Material
Steel
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416 type 2 cl 3 federal specification all treatment responses
NSN
5305-00-253-5607
Part Number
MS21318-8
Description
Screw,drive
CAGE
K0407

A hardened cylindrical fastener with multiple spiral flutes on its shank. It also has an end smaller in diameter than the outside diameter of the spiral flutes, which acts as a pilot when driven into a drilled hole.

Part MS21318-8 NSN 5305-00-253-5607

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15896
FIIG:
A003B0
Concept No.:
App. Key:
SD
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:
0.1000lbs
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:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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